C. 8.64m^2 because one face of the cube has a surface area of 1.44m^2 (1.2*1.2) and a cube has 6 sides (6*1.44).
I feel like there is something missing from this question, for example how large is the tree house? If these are just plain measurements, then I would opt for B.
By adding the two together. 31 added to 60 would be 91
Answer: Its little bit hard to become tutor. You need to give more answers.
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